855537018 has 16 divisors (see below), whose sum is σ = 1955513280. Its totient is φ = 244439136.

The previous prime is 855536999. The next prime is 855537043. The reversal of 855537018 is 810735558.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 20369929 = 855537018 / (8 + 5 + 5 + 5 + 3 + 7 + 0 + 1 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10184923 + ... + 10185006.

It is an arithmetic number, because the mean of its divisors is an integer number (122219580).

Almost surely, 2^855537018 is an apocalyptic number.

855537018 is an abundant number, since it is smaller than the sum of its proper divisors (1099976262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

855537018 is a wasteful number, since it uses less digits than its factorization.

855537018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20369941.

The product of its (nonzero) digits is 168000, while the sum is 42.

The square root of 855537018 is about 29249.5644070130. The cubic root of 855537018 is about 949.3206659477.

The spelling of 855537018 in words is "eight hundred fifty-five million, five hundred thirty-seven thousand, eighteen".